Sealing Film with Perimeter Edge Weakness for Tamper Evident Protection

Abstract

The disclosed sealing film is for surrounding a device for tamper evident protection of the contained device. The scaling film has a backing with a perimeter surrounding a central area and an adhesive on the backing at least at the perimeter of the backing. A substantial portion of the perimeter of the backing has an area of weakness. Therefore, attempted peeling, pulling, opening of the scaling film at the perimeter will cause tearing of the sealing film and indicate tampering.

1 . A sealing film for surrounding a device, the sealing film comprising:
 a backing, comprising:
 a first major surface; 
 a second major surface opposite the first major surface; 
 a perimeter surrounding a central area; 
 a first backing portion; and 
 a second backing portion; 
   an adhesive on the first major surface of the backing on at least the perimeter of the first backing portion; and   an area of weakness adjacent to and along a substantial portion of the perimeter of both the first backing portion and the second backing portion.   
     
     
         2 . The sealing film of  claim 1 , wherein the adhesive on the first backing portion contacts the second backing portion to form an adhesive bond; and
 wherein an amount of force required to break the adhesive bond is greater than an amount of force required to break the backing at the area of weakness in the backing.   
     
     
         3 . The sealing film of  claim 1 , further comprising a tear strip separating the first backing portion from the second backing portion, wherein the tear strip is separably connected to the first backing portion and the second backing portion. 
     
     
         4 . The sealing film of  claim 1 , wherein the first backing portion and second backing portion are symmetrical. 
     
     
         5 . The sealing film of  claim 1 , wherein the adhesive is a permanent, pressure sensitive adhesive. 
     
     
         6 . The sealing film of  claim 1 , wherein the adhesive is a contact adhesive. 
     
     
         7 . The sealing film of  claim 1 , wherein the central area is substantially free of adhesive. 
     
     
         8 . The sealing film of  claim 1 , wherein the area of weakness extends adjacent to and along all of the perimeter of the backing. 
     
     
         9 . The sealing film of  claim 1 , wherein the area of weakness comprises a slit in the backing. 
     
     
         10 . The sealing film of  claim 1 , wherein the area of weakness comprises a plurality of adjacent openings through the backing. 
     
     
         11 . (canceled) 
     
     
         12 . The sealing film of  claim 10 , wherein the plurality of adjacent openings are symmetrically disposed on the first backing portion and the second backing portion. 
     
     
         13 . The sealing film of  claim 10 , wherein the plurality of adjacent openings extend over substantially an entire surface area of the backing. 
     
     
         14 . The sealing film of  claim 1 , further comprising a release liner on the adhesive on the first major surface. 
     
     
         15 . The sealing film of  claim 1 , further comprising printed indicia on the first major surface of at least one of the first backing portion or the second backing portion.